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dc.date.accessioned2020-08-18T18:14:16Z
dc.date.available2020-08-18T18:14:16Z
dc.date.created2020-08-11T14:41:03Z
dc.date.issued2020
dc.identifier.citationKiraly, Agnes Portner, Daniel E. Haynie, Kirstie L. Chilson-Parks, Benjamin H. Ghosh, Tithi Jadamec, Margarete Makushkina, Anna Manga, Michael Moresi, Louis O'Farrell, Keely A. . The effect of slab gaps on subduction dynamics and mantle upwelling. Tectonophysics. 2020, 785
dc.identifier.urihttp://hdl.handle.net/10852/78493
dc.description.abstractGaps within a subducting plate can alter the surrounding mantle flow field and the overall subduction zone dynamics by allowing hot sub-slab mantle to flow through the gaps and into the mantle wedge. This through-slab flow can produce melting of the slab gap edges as well as significant upwelling that can lead to anomalous alkaline volcanism and/or dynamic uplift in the overriding plate, while the altered mantle flow patterns affect the trench evolution. Numerous geodynamic models have investigated the processes that form slab gaps, but few studies have examined the dynamics of slab gap-altered mantle flow, its effects on trench morphology and kinematics, or the controlling parameters on these processes. Here, laboratory subduction models with a pre-cut gap in a subducting silicone plate are used to explore how slab gap size, and slab gap depth influence the surrounding mantle flow field and trench dynamics. Results suggest that both the vertical extent and the depth of the top (trailing edge) of the slab gap are crucial parameters for modulating overall subduction dynamics. They show that a slab gap, which occurs near the surface and initially comprises 30% of the subducting plate width, can extend enough vertically in the slab to produce significant vertical flow through the gap. Changes to the trench geometry and kinematics are also evident in the models, such that double- and triple-arc geometries are formed during subduction of a shallow slab gap. All of these results are consistent with observations of slab gaps and their induced surface expressions, or the lack thereof, in Eastern Anatolia, East Java, Italy, and Argentina.
dc.languageEN
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleThe effect of slab gaps on subduction dynamics and mantle upwelling
dc.typeJournal article
dc.creator.authorKiraly, Agnes
dc.creator.authorPortner, Daniel E.
dc.creator.authorHaynie, Kirstie L.
dc.creator.authorChilson-Parks, Benjamin H.
dc.creator.authorGhosh, Tithi
dc.creator.authorJadamec, Margarete
dc.creator.authorMakushkina, Anna
dc.creator.authorManga, Michael
dc.creator.authorMoresi, Louis
dc.creator.authorO'Farrell, Keely A.
cristin.unitcode185,15,22,40
cristin.unitnameSenter for Jordens utvikling og dynamikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1
dc.identifier.cristin1822799
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tectonophysics&rft.volume=785&rft.spage=&rft.date=2020
dc.identifier.jtitleTectonophysics
dc.identifier.volume785
dc.identifier.doihttps://doi.org/10.1016/j.tecto.2020.228458
dc.identifier.urnURN:NBN:no-81642
dc.type.documentTidsskriftartikkel
dc.type.peerreviewedPeer reviewed
dc.source.issn0040-1951
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/78493/4/1-s2.0-S0040195120301414-main.pdf
dc.type.versionPublishedVersion
cristin.articleid228458


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